.--Among early works may be mentioned, S. Blommaert,
_Discours ende ghelegentheyt van het eylandt Borneo int Jear 1609_;
_Hachelyke reystogt van Jacob Jansz. de Roy na Borneo en Atchin in het
jaar 1691_; Beeckman, _Visit to Borneo_, 1718, in J. Pinkerton's
_General Collections_ (1808-1814); F. Valentijn in _Ond en Nieuw Oost
Indien_ (Dordrecht, 1724-1726). See also H. Keppel, _Expedition to
Borneo of H.M.S. "Dido"_ (London, 1846); R. Mundy, _Narrative of
Events in Borneo and Celebes_ (London, 1848); F.S. Marryat,
_Borneo_, &c. (1848); P.J. Veth, _Borneo's Westerafdeeling_
(Zalt-Bommel, 1854 and 1856); S. Muller, _Reizen en onderzoekingen in
den Indischen Archipel_ (Amsterdam, 1857); C. Bock, _Head-hunters of
Borneo_ (London, 1881), and _Reis in Oost en Zuid-Borneo_ (The Hague,
1887); J. Hatton, _The New Ceylon, a Sketch of British North Borneo_
(London, 1882); F. Hatton, _North Borneo_ (London, 1885); T. Posewitz,
_Borneo... Verbreitung der nutzbaren Mineralien_ (Berlin, 1889), Eng.
trans., _Borneo; its Geology and Mineral Resources_ (London, 1892); J.
Whitehead, _Exploration of Mount Kini Balu_ (London, 1893); Mrs W.B.
Pryor, _A Decade in Borneo_ (London, 1894); H. Ling Roth, _The Natives
of Sarawak and North Borneo_ (London, 1896); G.A.F. Molengraaf,
_Geologische Verkinningstochten in Centraal Borneo_ (Leiden, 1900,
Eng. trans. 1902); A.W. Niewenhuis, _In Centraal Borneo_ (Leiden,
1901), and _Quer durch Borneo_ (Leiden, 1904), &c.; W.H. Furness,
_Home Life of Borneo Head-hunters_ (London, 1902); O. Beccari, _Nelle
Foreste di Borneo_ (Florence, 1902), Eng. trans., _Wanderings in the
Great Forests of Borneo_ (London, 1904); D. Cator, _Everyday Life
among the Head-hunters_ (London, 1905). For geology, besides the works
of Posewitz and Molengraaf already cited, see R.B. Newton in _Geol.
Mag_., 1897, pp. 407-415, and _Proc. Malac. Soc_., London, vol. v.
(1902-1903), pp. 403-409. A series of papers on the palaeontology of
the island will be found in the several volumes of the _Samml. Geol_.
R. Mus., Leiden.

BORNHOLM, an island in the Baltic Sea, 22 m. S.E. of the Swedish coast,
belonging to Denmark, lying on 15 deg. E., and between 55 deg. and 55
deg. 18' N., and measuring 24 m. from S.E. to N.W. and 19 (extreme) from
E. to W. Pop. (1901) 40,889. The surface is generally hilly; the scenery
is fine in the north, where the cliffs reach a height of 135 ft., and